What does the massive size of Rhamphosuchus imply about the aquatic systems it inhabited?

Answer

They must have been incredibly rich in resources

The size estimates for Rhamphosuchus suggest the rivers it inhabited were incredibly rich, capable of supporting the caloric needs of such a gigantic creature.

What does the massive size of Rhamphosuchus imply about the aquatic systems it inhabited?
habitatanimalpaleontologyPrehistoricRhamphosuchus